He is a Prussian warrior and the leader of the Red Lion Knights. He went to Japan to deal with the threat of Mizuki Rashojin. In his ending, he saves his country from demons and is married to Elizabeth, the daughter of the Prussian King. Elizabeth has been in love with Sieger ever since he rescued her from monsters.

In the spin-off, Samurai Spirits RPG, he married Queen Victoria and is protecting France against any demon attacks. He assists the party battling Mizuki whilst they are in Paris and Green Hell. However, Mizuki traps him within one of the Dark Bells, a medium which increases Ambrosia's powers and siphons evil spirits. Knowing the dangers of the bell, he allows the party to destroy it, killing himself in the process.

Intro patch by Cannon Musume for the author's Sho Hayate included.